88 lines
2.3 KiB
Rust
88 lines
2.3 KiB
Rust
use itertools::Itertools;
|
|
use language::{ProgrammingLanguageInterface, EvalOptions, TraceArtifact, ReplOutput};
|
|
|
|
mod parsing;
|
|
mod type_check;
|
|
mod eval;
|
|
|
|
use self::type_check::{TypeContext};
|
|
|
|
pub struct Schala {
|
|
state: eval::ReplState,
|
|
type_context: TypeContext
|
|
}
|
|
|
|
impl Schala {
|
|
pub fn new() -> Schala {
|
|
Schala {
|
|
state: eval::ReplState::new(),
|
|
type_context: TypeContext::new(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ProgrammingLanguageInterface for Schala {
|
|
fn get_language_name(&self) -> String {
|
|
"Schala".to_string()
|
|
}
|
|
|
|
fn get_source_file_suffix(&self) -> String {
|
|
format!("schala")
|
|
}
|
|
|
|
fn evaluate_in_repl(&mut self, input: &str, options: &EvalOptions) -> ReplOutput {
|
|
let mut output = ReplOutput::default();
|
|
let tokens = parsing::tokenize(input);
|
|
if options.debug_tokens {
|
|
let token_string = tokens.iter().map(|t| format!("{:?}<{}>", t.token_type, t.offset)).join(", ");
|
|
output.add_artifact(TraceArtifact::new("tokens", format!("{:?}", token_string)));
|
|
|
|
}
|
|
|
|
{
|
|
let token_errors: Vec<&String> = tokens.iter().filter_map(|t| t.get_error()).collect();
|
|
if token_errors.len() != 0 {
|
|
output.add_output(format!("Tokenization error: {:?}\n", token_errors));
|
|
return output;
|
|
}
|
|
}
|
|
|
|
let ast = match parsing::parse(tokens) {
|
|
(Ok(ast), trace) => {
|
|
if options.debug_parse {
|
|
output.add_artifact(TraceArtifact::new_parse_trace(trace));
|
|
output.add_artifact(TraceArtifact::new("ast", format!("{:?}", ast)));
|
|
}
|
|
ast
|
|
},
|
|
(Err(err), trace) => {
|
|
output.add_artifact(TraceArtifact::new_parse_trace(trace));
|
|
output.add_output(format!("Parse error: {:?}\n", err.msg));
|
|
return output;
|
|
}
|
|
};
|
|
|
|
match self.type_context.type_check(&ast) {
|
|
Ok(t) => (),
|
|
Err(msg) => {
|
|
output.add_artifact(TraceArtifact::new("type_check", msg));
|
|
output.add_output(format!("Type error"));
|
|
return output;
|
|
}
|
|
}
|
|
|
|
let evaluation_output = self.state.evaluate(ast);
|
|
let mut acc = String::new();
|
|
let mut iter = evaluation_output.iter().peekable();
|
|
while let Some(s) = iter.next() {
|
|
acc.push_str(&s);
|
|
if let Some(_) = iter.peek() {
|
|
acc.push_str("\n");
|
|
}
|
|
}
|
|
|
|
output.add_output(acc);
|
|
return output;
|
|
}
|
|
}
|